If the deal is approved, it will leave Nexedi and end-users in an uncertain place, according to a letter that company CEO Jean-Paul Smets sent to the E.U. Monday.

Nexedi's open-source ERP5 product is based on MySQL, which has enabled the vendor to support a number of storage platforms and use the MySQL Cluster technology to handle large amounts of data, according to the letter.

But the pending acquisition of MySQL by Oracle "has changed the situation," the letter states.

"MySQL has become a liability to Nexedi. Our competitive advantage in the field of business applications has decreased because of the acquisition of MySQL by Oracle," Smets wrote.

"There are no competing open source relational databases which can match the performance of MySQL Cluster for very large data sets," Smets added. But Oracle's "poor track record" with past acquisitions means "the risk is very high that Oracle will destroy the value of MySQL and of its underlying open source technologies in order to promote its own proprietary technologies, both in the field [of] database and in the field of business applications," he wrote.

Nexedi is asking the E.U. to ask Oracle to sell off MySQL to a third party "which offers reasonable guarantees to develop it commercially under an open source business model." It is offering €1 to "relieve Oracle from what has become both a negative asset in its merger and acquisition strategy, and a negative asset to the open source and Free Software communities."